How much of the new book will contain details about anything that's changed between OS X 10.10 Yosemite and OS X 10.11 El Capitan? I saw in the ToC web pages that System Integrity Protection (informally, Rootless) will be covered, but I didn't see anything in 'The Graphics Architecture' about Metal, so could you add that in? Also, I think it would be interesting to have some information about OS X's audio system, too, so count me in for looking forward to seeing that if you get around to including it.

How much of the new book will contain details about anything that's changed between OS X 10.10 Yosemite and OS X 10.11 El Capitan? I saw in the ToC web pages that System Integrity Protection (informally, Rootless) will be covered, but I didn't see anything in 'The Graphics Architecture' about Metal, so could you add that in? Also, I think it would be interesting to have some information about OS X's audio system, too, so count me in for looking forward to seeing that if you get around to including it.

Excellent idea! Hypervisor framework is super cool. It's actually pretty well documented in its .h files, since it's a public framework -- but I should mention its inner mechanisms (via IOKit and Kext). Definitely adding that in. Might do it in a companion article, though.

Excellent idea! Hypervisor framework is super cool. It's actually pretty well documented in its .h files, since it's a public framework -- but I should mention its inner mechanisms (via IOKit and Kext). Definitely adding that in. Might do it in a companion article, though.